Lentil Soup with back

3 cups vegetable broth 3 cups water 2 cups brown lentils , picked over and rinsed 1 tablespoon olive oil 1 large onion , peeled and coarsely chopped 2 large[...]

1 (14 ounce) can crushed tomatoes 5 tablespoons olive oil 1/2 lb dried lentils 1 onion , chopped 2 carrots , chopped 2 celery ribs , chopped 4 stalks swiss[...]